When researchers tried to mimic the results on other animals, such as chick embryos, it did not have the same effect.

He took part in the clinical trial of an experimental smallpox vaccine derived from chick embryos.

The failure of antibody production in the chick embryo.

The life span of a fibroblast, as measured in chick embryos, is 57 3 days.

These include those with an allergy to eggs, since the vaccine virus is grown in chick embryos.

Then he fetches a Petri dish with a chick embryo a few days old.

This plastic could be shaped into an egg and used to grow chick embryos.

He investigated chick embryos by breaking open eggs and observing them at various stages of development.

The marginal zone of a chick embryo contains cells that will contribute to the streak.

Host versus graft response was first described in the chick embryo.